Rotary swaging machine



Oct. 18, 1949. s; SMITH ROTARY SWAGING MACHINE 2 'sheets-sheet 1 Filed Jan. 8, 1945 "Q MQ Oct. 18, 1949. s. SMITH ROTARY SWAGING MACHINE 2 sheets-sheet 2` Filed Jan. 8, 1945 .J ,n a

/nuffn/fl liar/7624s' I Patented Oct. 18, 1949 UNITED STATES PATENT CFFICE v 2,485,326 ROTARY vSWAGING` MACHINE Samuel Smith, Elmdon, England Application January 8, 1945, Serial No. 571,774 In Great Britain January 17, 1944 This invention has reference to improvements in rotary swaging machines, and relates to that type of machine in which blows at a great rapidity are imparted to the workpiece in order to reduce through the agency of dies, say rod, tube or wire. The salient features of such a machine are the rotating spindle mounted in a housing, and an enlarged end to the spindle which has a transverse slot therein at right angles to its axis. This spindle carries a pair of half dies which are each associated with a hammer block, the enlarged end being surrounded by an annular stationary cage which is provided with a plurality of rollers located in a hardened steel track shrunk in a housing surrounding the head of the spindle. The dimensions of the dies and the hammer blocks are so arranged that as the spindle revolves and the blocks pass between each pair of diametrically disposed rollers the dies are forced together and are thus caused to impart repetitive blows to the workpiece.

It will be obvious that as a result of wear or other cause the pressure on the dies will diminish and it is known practice to insert steel shims between the dies and the hammer blocks to maintain this pressure; alternatively wedges have been proposed mounted and adjusted so as to set up pressure between the diametrically arranged pair of rollers and the swaging dies. Such 4wedges provide a recognised means of maintaining such pressure, but under existing conditions involve constructional diculties in the machine, and the primary object of 'the present invention is to provide a simple wedge pressure setting up device which is readily adjustable and inexpensive to produce.

This invention consists of a rotary swaging machine of the kind herein referred to, and is characterised by the wedges located between the half dies and the hammer blocks being connected to a tubular adjustment device extending through the hollow rotating spindle whereby a simultaneous adjustment of the wedges can be eiected from an external part of the machine.

The invention will now be described in one form with particular reference to the accompanying drawings, in which:

Fig. l is a longitudinal sectional elevation through the axis of the rotating spindle.

Fig. 2 is a cross-sectional end elevation on line 2 2 of Fig. 1.

Fig. 3 is a plan of the enlarged end of the rotating spindle.

s cnims. (c1. vs -22) end of Fig. 1.

The rotating hollow spindle a is provided at the one end with an enlarged head a1 which accommodates a hardened steel liner b of channel formation. Within this liner there is reciprocally mounted the pair of half dies c and the hammer blocks d, each hammer block locating a kroller anvil e the periphery of which is adapted to make contact with the peripheries of the series of swaging rollers f located within a stationary annular cage (not shown). This form of rotary swaging machine is well-known.

Located between the pair of half dies c is the workpiece which is Vfed through the aperture c1 and it will be obvious that it is during this passage of the workpiece through the aperture that the swaging down operation takes eiect.

The particular feature of the present invention resides in the means of simultaneously adjusting the position of the wedges g which are interposed between the outer faces of the half dies c and the inner faces of the hammer blocks d, the wedges also having free location within slots b1 in the rearface of the steel liner b and the slots h1 formed in the end cover plate h bolted to the enlarged head a1 of the spindle a. These wedges are arcuately notched at g1 and are engaged by the edge of a disc y', the boss 71 of the disc being iirmly secured by a screwed and/or welded connection to the inner end of a tube 7c which is located co-axially within the hollow spindle a, the outer end of the tube being extended and screwthreaded and provided with a split tapped collar l which is secured to the tube by means of a set pin m. This collar is screwed on to the extending end of the tube 7c and on to the reduced end of the hollow spindle a, and thus forms a mounting and coupling for theY tube k relative to the hollow spindle cL.v When the split part of the collar l is slackened on the threaded end of the tube lc a key or Spanner may be engaged with the extended end of this tube by which means the desired longitudinal adjustment of the tube and consequently of the disc can be effected to vary the setting of the wedges g and therefore the spacing apart of the pair of half dies c and of the hammer blocks d. v

Rotation is imparted to the spindle a by means of a ily wheel or pulley indicated by dotted lines designated p in Fig. l, the fly wheel or pulley being anchored to the spindle and laterally positioned by means of the pair of tapped collars n which engage threaded sections of the periphery of the spindle a.

I claim:

1. In a rotary swaging machine, in combination, a hollow rotary spindle, swaging dies carried by the spindle, a hammer block carried by the spindle outside of each swaging die, a Wedge between each die and the adjacent hammer block, and a shaft that is rotatably mounted within the hollow spindle and has a connection with the spindle and a connection with said wedges, the rst of said connections being a screw connection .and the other lfbeing :ea ithrust tbearing,

m'rwateslt "ctrnear itseendfthegpetipheral por-A whereby usaam -wedges are shifted many ofthe 10 tionofsid discfbeingfrfeaeedin Suh notches spindle by rotating the shaft relative to the spindle.

2. In a rotary swaging machineinvoxbination, a hollow rotary spindle, swagingtdies carried by the spindle, a hammer block carried'by the spindle outside of each swaging.die,=a'zwedge between each die and the adjacent hammer block, a shaft rotatably mounted within the .hollow spindle, the wedges being connected to move axially with .said shaft,anut threaded .on theend 20 o'f the spindle, `-having an integral split collar throuh'which said'shaft is"threaded, and means for'tightening'the split cllar'after :saidshaftiha's beenscrewedthrough thecllar to set the wedges nthe'tlesired position.

f3. In a'rotary swagingma-chine, in combination,'ahollowrotary'fspinklla "swaging dies cariREFERENCES CITED Eheifollowing references are of record in the le o`f this' patent:

Nmnber Name 'Date *5582648 Morse Aug. 24,I'897 6375449 Dayton LNov. 21, 1899 ,'835329 Horton llNov. 13, "11906 "15l0'7621 vPerry "et 'aL :Sept "-9, '1924 X19'55535 Con'ner net al. *Apin 11934 

